It was intended to raise a smile and much-needed funds for a popular charity but a risque calendar has prompted anger among ambulance staff.
The calendar, produced on behalf of the North West Air Ambulance, has been banned from ambulance stations across the region.
Members of the public and air ambulance staff, some of whom are from Lancashire, agreed to be pictured for the calendar, Bare In The Air.
The volunteers, including the helicopter pilot, posed nude, with parts of the aircraft and a variety of strategically-placed props to cover them.
But paramedics from the North West Ambulance Service (NWAS) are up in arms about the poses.
They say their integrity and dignity at work policy has been compromised as people will associate them with the saucy pictures.
The Evening Post understands NWAS bosses are also furious that the calendar has been released without their knowledge.
Paramedics from NWAS are seconded to work on the helicopter and the two organisations work together to save lives.
A spokesman for NWAS said: "We neither support nor endorse this calendar."
A spokeswoman from the North West Air Ambulance (NWAA) said: "The overwhelming response we have had has been absolutely fantastic.
"It is the charity's responsibility to keep the aircraft flying and we will do whatever we can to raise the huge amount of money needed."
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